Daemonize after certain possible errors (#177)

* Daemonize after certain possible errors.

* Removed nochdir variable

src/logkeys.cc

@@ -116,7 +116,7 @@ void create_PID_file()
    close(pid_fd);
  }
  else {
    if (errno == EEXIST)
    if (errno == EEXIST)  // This should never happen
         error(EXIT_FAILURE, errno, "Another process already running? Quitting. (" PID_FILE ")");
    else error(EXIT_FAILURE, errno, "Error opening PID file '" PID_FILE "'");
  }
@@ -424,14 +424,6 @@ int main(int argc, char **argv)

  set_signal_handling();

  if (!(args.flags & FLAG_NO_DAEMON)) {
    int nochdir = 0;
    if (args.logfile[0] != '/')
         nochdir = 1;  // don't chdir (logfile specified with relative path)
    int noclose = 1;  // don't close streams (stderr used)
    if (daemon(nochdir, noclose) == -1)  // become daemon
      error(EXIT_FAILURE, errno, "Failed to become daemon");
  }
  close(STDIN_FILENO);
  // leave stderr open
  if (args.logfile != "-") {
@@ -461,7 +453,16 @@ int main(int argc, char **argv)
  }
  if (!out)
    error(EXIT_FAILURE, errno, "Error opening output file '%s'", args.logfile.c_str());


  if (access(PID_FILE, F_OK) != -1)  // PID file already exists
    error(EXIT_FAILURE, errno, "Another process already running? Quitting. (" PID_FILE ")");

  if (!(args.flags & FLAG_NO_DAEMON)) {
    int noclose = 1;  // don't close streams (stderr used)
    if (daemon(0, noclose) == -1)  // become daemon
      error(EXIT_FAILURE, errno, "Failed to become daemon");
  }

  // now we need those privileges back in order to create system-wide PID_FILE
  seteuid(0); setegid(0);
  if (!(args.flags & FLAG_NO_DAEMON)) {